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Consolidated Statements of Changes in Shareholders’ Equity (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends per share (in usd per share)	$ 0.12	$ 0.10
Stock-based compensation plans, issuance of stock (in shares)	75,923	0
Issuance of stock, common stock forfeited (in shares)	0	6,268
Compensation expense, issuance of stock	$ 480	$ 303
Issuance of treasury stock (in shares)	0	53,367
Acquisition of treasury stock (in shares)	10,648	0

X

- Definition

Amount of increase to additional paid-in capital (APIC) resulting from recognition of equity-based compensation for restricted stock units.

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
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- Definition

Number of shares issued during the period as a result of an employee stock purchase plan.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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Number of shares (or other type of equity) forfeited during the period.

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Gross number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP). Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Number of shares that have been repurchased during the period and are being held in treasury.

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